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This front mounting intercooler kit has been designed as an upgrade for the Audi S4 B9 and fits the Audi 2.0TFSI A4 B9. Offering a huge 128% increase in frontal area and matching increase in internal volume the Forge intercooler is a must have for...

The APR Intercooler System is a massive front mounted upgrade that dramatically reduces intake air temperature (IAT), minimizes heat soak, and provides increased performance! The system is an easy to install, direct bolt-on design, that is recommended at...

The Engineering team at ECS Tuning has spent countless hours in the development of the exclusive Audi B9 S4 3.0T Kohlefaser Luft-Technik (Carbon Fiber Air Technology) Cold Air Intake System. This intake was precision engineered using...

The Engineering team at ECS Tuning has spent countless hours in the development of the exclusive Audi B9 S4 3.0T Luft-Technik (Air Technology) Cold Air Intake System. This intake was precision engineered using state of the art laser...

One of the most cost-effective improvements you can make to your car, improving power and economy. The Racingline Performance Panel Filter simply fits directly into the airbox as a direct replacement for the standard restrictive paper air filter element.

Forge Catch Tank Kit for the S4 and S5 (B9) This oil catch tank kit is the product of many months of intensive research and development by our in-house development team, and the end result is by far the most complete oil collection system currently...

Forge Transmission Mount Insert for the S4 and S5 (B9) This precision-machined bush insert has been carefully designed to reduce the range of movement in the standard transmission mounting bush, by adding this bush to the natural recesses in the OEM...

Forge Motorsport Valve for the Audi S4 and S5 B9 This product is a solenoid operated valve that integrates seamlessly with the OEM electronics resulting in absolutely no-fault codes, no check engine lights, and no detriment to the performance of the...